Preparation1. Put shredded zucchini in a clean kitchen towel and squeeze to remove as much moisture as possible. 2. Whisk flour, baking powder, pumpkin pie spice and salt in a large bowl. Whisk eggs, milk, butter, brown sugar and vanilla in a medium bowl. Make a well in the center of the dry ingredients, add wet ingredients and whisk until combined. Fold in the zucchini and nuts. 3. Coat a large nonstick skillet (or griddle) with cooking spray; heat over medium heat. Cook pancakes in batches, using a scant 1/3 cup batter for each and spreading it to make them about 4 inches wide. Cook until bubbles dot the surface, 1 to 3 minutes. Flip and brown on the other side, 1 to 2 minutes more. Reduce the heat if the pancakes are browning too quickly. Serve hot.